The Collaborative International Dictionary of English v.0.48:

Pettiness \Pet"ti*ness\, n.
   The quality or state of being petty or paltry; littleness;
   meanness.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pettiness
    n 1: narrowness of mind or ideas or views
    2: the quality of being unimportant and petty or frivolous [syn:
       pettiness, triviality, slightness, puniness]
    3: lack of generosity in trifling matters [syn: pettiness,
       littleness, smallness]

Moby Thesaurus II by Grady Ward, 1.0:

118 Moby Thesaurus words for "pettiness":
   abjectness, abominableness, atrociousness, authoritarianism,
   baseness, beggarliness, bigotry, blind side, blind spot, blinders,
   closed mind, contemptibility, contemptibleness, cramped ideas,
   crumminess, daintiness, debasement, deficiency, degradation,
   delicacy, depravity, despicableness, diminutiveness, enormity,
   execrableness, exiguity, exiguousness, failure, fanaticism,
   fewness, foulness, fulsomeness, grossness, heinousness,
   hideboundness, illiberality, immateriality, imperfection,
   inadequacy, incompetence, inconsequence, inconsequentiality,
   inconsiderableness, indifference, ineffectuality, inferiority,
   insignificance, insufficiency, insularism, insularity, irrelevance,
   little-mindedness, littleness, low priority, lowness,
   maladroitness, marginality, meagerness, mean mind, meanness,
   mediocrity, minginess, minuteness, miserableness, moderateness,
   monstrousness, narrow sympathies, narrow views, narrow-mindedness,
   narrowness, nearsightedness, nefariousness, negligibility,
   niggardliness, obnoxiousness, odiousness, odium theologicum,
   paltriness, parochialism, petty mind, picayune, picayunishness,
   pokiness, poorness, provincialism, puniness, purblindness,
   rankness, scabbiness, scantiness, scrubbiness, scruffiness,
   scumminess, scurviness, secondariness, shabbiness, shoddiness,
   shortsightedness, shut mind, slightness, smallness, squalor,
   stinginess, straitlacedness, stuffiness, subnormality, tininess,
   triviality, uncatholicity, ungenerousness, unimportance,
   unimpressiveness, unmagnanimousness, unnoteworthiness,
   unskillfulness, vileness, vulgarity, wretchedness